44 entries under adjective topic. ×
| lasting(stable, constant, vast, enduring) | |
| long-term(vast, permanent, lifelong, diurnal) | |
| longstanding(vast, permanent, long-term, lifelong) | |
| perduring(stable, constant, vast, enduring) | |
| perennial(stable, constant, enduring, lasting) | |
| set in concrete(expression, stable, constant, vast) | |
| set in stone(expression, idiom, stable, constant) | |
| termless(vast, lasting, permanent, everlasting) | |
| timeless(vast, lasting, permanent, everlasting) | |
| undefined | |
| unending(enduring, lasting, infinite, permanent) | |
| unfading(stable, constant, enduring, lasting) | |
| vast(large, wide) | |
| ad-infinitum | |
| boundless | |
| deathless | |
| immortal | |
| infinite | |
| everlasting(adverb, stable, constant, enduring) | |
| endless(huge, immense, infinite, permanent) |
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| APA | Smart Define. (2015). forever thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/forever/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "forever thesaurus" https://smartdefine.org/forever/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, forever thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/forever/thesaurus/synonyms>. |
| MLA | Smart Define. "forever thesaurus" 15 December 2015. Web. 24 September 2026. <https://smartdefine.org/forever/thesaurus/synonyms> |